Related Experiment Video
Updated: Oct 25, 2025
09:22
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
8.0K
Preparation and Chiral Applications of Optically Active Polyamides
1State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Macromolecular Rapid Communications
|August 4, 2021
Summary
This review explores chiral polyamides, focusing on their preparation, new categories like helical polyamides, and applications in asymmetric catalysis and separations. It highlights challenges and future directions in optically active polymer research.
Area of Science:
- Polymer Chemistry
- Materials Science
- Organic Chemistry
Background:
- Chirality is fundamental in nature, impacting various scientific disciplines.
- Polyamides are versatile polymers with significant industrial applications.
- Integrating chirality into polyamides yields optically active polymers with unique properties.
Purpose of the Study:
- To review the synthesis methods for chiral polyamides.
- To introduce novel chiral polyamide categories, such as helical structures.
- To summarize the applications of optically active polyamides in chiral technologies.
Main Methods:
- Solution polycondensation
- Interfacial polycondensation
- Ring-opening polymerization
Main Results:
- Diverse preparation routes for chiral polyamides are detailed.
- Emerging categories like helical polyamides and chiral polyamide-imides are presented.
- Key applications in asymmetric catalysis, membrane separation, and enantioselective crystallization are discussed.
Conclusions:
- Chiral polyamides offer significant potential in advanced chiral applications.
- Further research is needed to overcome current challenges in their synthesis and application.
- Future perspectives point towards innovative developments in optically active polymer science.
More Related Videos
Related Concept Videos
01:26Polymer Classification: Stereospecificity
2.9K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.9K
02:05Prochirality
4.2K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
4.2K
02:24Properties of Enantiomers and Optical Activity
19.2K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
19.2K
01:29Preparation of Amides
3.4K
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
3.4K
01:20Anionic Chain-Growth Polymerization: Overview
2.2K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.2K
01:22Preparation of 1° Amines: Azide Synthesis
4.2K
Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
4.2K